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| <a name="boost.apply_visitor_idp309222624"></a><div class="titlepage"></div> |
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| <h2><span class="refentrytitle">Function apply_visitor /*three or more variant parameters*/</span></h2> |
| <p>boost::apply_visitor /*three or more variant parameters*/</p> |
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| <h2 xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv-title">Synopsis</h2> |
| <div xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv"><pre class="synopsis"><span class="comment">// In header: <<a class="link" href="../variant/reference.html#header.boost.variant.multivisitors_hpp" title="Header <boost/variant/multivisitors.hpp>">boost/variant/multivisitors.hpp</a>> |
| |
| </span> |
| <span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> MultiVisitor<span class="special">,</span> <span class="keyword">typename</span> Variant1<span class="special">,</span> <span class="keyword">typename</span> Variant2<span class="special">,</span> |
| <span class="keyword">typename</span> Variant3<span class="special">></span> |
| <span class="keyword">typename</span> <span class="identifier">MultiVisitor</span><span class="special">::</span><span class="identifier">result_type</span> <span class="identifier">OR</span> <span class="keyword">decltype</span><span class="special">(</span><span class="keyword">auto</span><span class="special">)</span> |
| <span class="identifier">apply_visitor</span> <span class="comment">/*three or more variant parameters*/</span><span class="special">(</span><span class="identifier">MultiVisitor</span> <span class="special">&</span> visitor<span class="special">,</span> |
| <span class="identifier">Variant1</span> <span class="special">&</span> operand1<span class="special">,</span> |
| <span class="identifier">Variant2</span> <span class="special">&</span> operand2<span class="special">,</span> |
| <span class="identifier">Variant3</span> <span class="special">&</span> operand3<span class="special">,</span> |
| <span class="special">...</span> other_operands<span class="special">)</span><span class="special">;</span> |
| <span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> MultiVisitor<span class="special">,</span> <span class="keyword">typename</span> Variant1<span class="special">,</span> <span class="keyword">typename</span> Variant2<span class="special">,</span> |
| <span class="keyword">typename</span> Variant3<span class="special">></span> |
| <span class="keyword">typename</span> <span class="identifier">MultiVisitor</span><span class="special">::</span><span class="identifier">result_type</span> <span class="identifier">OR</span> <span class="keyword">decltype</span><span class="special">(</span><span class="keyword">auto</span><span class="special">)</span> |
| <span class="identifier">apply_visitor</span> <span class="comment">/*three or more variant parameters*/</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">MultiVisitor</span> <span class="special">&</span> visitor<span class="special">,</span> |
| <span class="identifier">Variant1</span> <span class="special">&</span> operand1<span class="special">,</span> |
| <span class="identifier">Variant2</span> <span class="special">&</span> operand2<span class="special">,</span> |
| <span class="identifier">Variant3</span> <span class="special">&</span> operand3<span class="special">,</span> |
| <span class="special">...</span> other_operands<span class="special">)</span><span class="special">;</span></pre></div> |
| <div class="refsect1"> |
| <a name="idp520282320"></a><h2>Description</h2> |
| <p>Allows compile-time checked type-safe application of the |
| given visitor to the content of the given variant, ensuring that all |
| types are handled by the visitor. See <code class="computeroutput"><a class="link" href="apply_visitor.html" title="Function apply_visitor">apply_visitor</a></code> |
| for more information.</p> |
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| <td align="right"><div class="copyright-footer">Copyright © 2002, 2003 Eric Friedman, Itay Maman<p>Distributed under the Boost Software License, Version 1.0. |
| (See accompanying file <code class="filename">LICENSE_1_0.txt</code> or copy at |
| <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>) |
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